500 Coleopterolorjical Nofices, VI. 



The male, which is the only sex known to me, has the fifth ven- 

 tral short, only slightly longer than the fourth and broadly sinu- 

 ate toward the middle at apex with the disk unmodified, and the 

 genital segment broadly emarginate and broadly impresso-canal- 

 iculate along the middle, the under part of the dorsal pygidiura 

 large and densel}^ bristling with short black hairs at apex. 



38. T. iiiaeqtialisn. sp. — Pamllel, moderately narrow, convex, polished, 

 black, the elytra finely ru<>;ulose, alutaceous and with a very feeble teneo- 

 piceous tinge; legs and antenna^ red, the eleventh joint of the latter dusky; 

 pu})escence even in length, A\ithoiit trace of intermixed setiv, rather coai-se 

 and sparse, suberect, dark near the elytral suture; marginal fringe of the pro- 

 notum dense, even and \erv short, of the elytra longer and cinereous. Head 

 about two-thirds as wide as the prothorax, rather coarsely but not densely 

 punctate, the interspaces smooth; anterior impressions very broad and feeble; 

 epistoma with only a very fine pale apical border: labrum very short and 

 broad, feebly arcuate at apex ; eyes rather large and prominent, attaining the 

 base; antenna? short, barely longer than the prothorax, rather broad and 

 strongly compressed, the tenth joint strongly trans^•erse and wider than the 

 eleventh, fifth very feebly dilated. Prothora.v two-thirds wider than long, the 

 sides subparalh'l, evenly and strongly arcuate; all the angles obtuse and 

 rounded but traceable; apex just visibly narrower than the Jiase; punc- 

 tures sparse, not very coarse but widely impressed; interspaces smooth and 

 polished, not in the least rugose at the sides. Elytra barely one-half longer 

 than wide, not distinctly wider than the prothorax, parallel, obtusely rounded 

 behind, broadly sinuate at base, sparsely and quite coarsely punctate. Ab- 

 domen finely and somewhat densely cinereo-pubescent. Length 2.6-2.8 mm.; 

 width 0.9-1.1 mm. 



Colorado. 



The male serving for the t3'pe has the fifth ventral broadly trun- 

 cate at apex, the adjacent edge feebl}' inflexed and subimpunetate 

 but with the disk otherwise unmodified. Three males. 



39. T. silbcalviis n. sp. — Oblong, convex, highly polished and black 

 throughout; legs black, thetibiieand tarsi piceo-rufous, the former dusky to- 

 ward base; antennse black, the funicle scarcely visibly picescent toward base; 

 pubescence rather fine, short and sparse, subdecumbent, cinereous, the haii-s 

 l)lackish on the pronotum except near the sides, and in a bioad sul)sutural 

 stripe on each elytron; marginal cilia of the pronotum even, dense, somewliat 

 long and in great part Ijhvckish in color, of the elytra longer, sparser and more 

 cinereous. Head three-fifths as wide as the prothorax, finely, sparsely punc- 

 tate, the interspcoces smooth, rugulose toward the sides, the impressions very 

 large, broadly impressed ; epistoma rather long but wide, truncate, black; la- 

 brum broad, circularly- rounded, slightly pale near the apex ; eyes rather large 

 and prominent; antennae but little longer than the prothorax, somewhat sleu- 



